AutoCAD 2002 Bible

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As an example, the architectural drawing in Figure 5-8 is 175-feet wide by 120-feet high. The two most typical scales for a drawing of a house are X»=1′ and /4″=1′. On a small plotter, you might have a choice of sheet sizes A, B, or C. The following steps show the calculations you need to do in order to decide on a scale, obtain the scale factor, and determine the appropriate sheet size.

In this exercise, you practice determining the scale and sheet size. You need only a sheet of paper and a pencil. Use Figure 5-8 (shown earlier) as a reference.

Step-by-Step: Determining the Scale and Sheet Size

1. To calculate the plotted size of the drawing at X»=1′, you can start with the width, which is 175′. Take one-quarter of 175 to get the width of the drawing in inches, which is 43/4″.

2.    Take one-quarter of the height, 120′, to get the height of the drawing in inches, which is 30″.

3.    A size-C sheet (see Table 5-3) is 22″x17″, which is too small for a 43/4‘»x30″ drawing.

4.    Recalculate the drawing at )8«=1′. Take one-eighth of 175 to get 21/8. Take one-eighth of 120 to get 15″.

5.    The actual drawing space (minus the margins the printer requires) on a size-C sheet is about 21″x16″. The height of the drawing at this scale is adequate, but the width is 7/8″ too long. Therefore, the best bet is to simply make the drawing 7/8″ narrower because the drawing has some extra room. This lets you fit the drawing on a size-C sheet.

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